This service repair manual provides comprehensive information for the Yamaha F100B-C outboard motor. Designed for marine propulsion, this engine is a testament to Yamaha's commitment to engineering excellence and reliability. The manual covers various model variants, including F100BET/L, F100BET/X, F100CET/L, and F100CET/X, with specific serial number ranges detailed to ensure accurate identification. Owners and operators can expect detailed guidance on maintaining and operating this robust marine engine. This English-language manual offers complete and intact coverage for all models, engines, trim, and transmission types. It features step-by-step instructions, diagrams, and exploded views, facilitating a thorough understanding of the outboard motor. The content extends to complete disassembly and repair, making it an invaluable resource for owners, mechanics, and technicians alike. With this manual, users can confidently perform maintenance, troubleshooting, and repairs to ensure the optimal performance and longevity of their Yamaha outboard motor.